I sm thinking what the others have suggested, that RIA doesn't have a whole lot of experience with 10mm.

Even Colt had issues at first with their Delta Elite (as you know).

RIA doesn't seem to be the only one. The EAA Witness 10MM also come out of the box with a weaker recoil spring than what is needed. I get the impression they just use the same recoil spring in all models.

RIA doesn't seem to be the only one. The EAA Witness 10MM also come out of the box with a weaker recoil spring than what is needed. I get the impression they just use the same recoil spring in all models.

Probably so. Even Glock uses the same recoil spring in the G20 as they do in their .45 cal G21. Though, the G20 slide is beefed up compared to the G21 slide.

I talked to the gunsmith at RIA again and he insist that a heavier spring, heavier than 16# would not work in the RIA 1911 10mm, He tried that out himself. I asked about the Colt Delta Elite 10mm using a 20+lb spring and he said because they had feed issues. He also said to add a shock buffer by WC, this will help.

The only was to verify the claim by the RIA 10mm GS is to put it through the test. I will let y'all know what I find out when the springs come in. The 16# will be here Monday or Tuesday, I'll order a 20 and 21lb Monday.

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Spent brass to me is like the ring to Gollum "We wants it, we needs it. Must have the precious"